Gold futures climb to a one-week high

SAN FRANCISCO (MarketWatch) -- December gold was last up $5 at $681.60 an ounce Friday morning. It climbed as high as $682.50, the contract's strongest level since July 26 as concerns over a weaker U.S. economy sparked demand for gold. The contract was set to gain more than 1% for the week. September silver gained 18.5 cents, or 1.4%, to $13.18 an ounce. September copper fell by 3.3 cents to $3.54 a pound.

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